Bake oven



.-.Augl s 1926.

1,594,447 R. P. B OLLlNG l BAKE OVEN Filed Dec, 18. 1922 4 SheetS-Sheet1 @www Avg- 3,1926.

R. P. BOLLING 1,594,447

BAKEOVEN Filed De@ 18, 1922 4 Sheets-Sheet 2 l l I mfmxm Aug. 3, 192e.

R. P. BOLLING' BAKE OVEN Filed Deo. 1g. 1922 4 Sheets-Sheet 5 EMM ffazzyMMM@ goingthe baking operation.

Patented thug. 3,

Uitl-ire stares RGBERT P. ROLLING, OF' DETROJI'RiMICEIGAN.

BAKE ovnN..

Application filed December This invention relates to a bake oven andespecially to a rotating sheli bake oven which is calculated to secure auniform application. of heat to all the stuit under- In my prior PatentNo. 1,483,598, October 31, 1922, I- have describedy und claimed a balieoven having rotating shelves, however, this bake oven is provided with acentral spindle or shaft which limits the size oi" the pains that may beinserted and somewhat. interferes' with the free arrangement andisliding oi' the pans on the shelves.

It isthe object of the presentinventio'n to provide an arrangement inwhich a vertical series of shelves is supportedv and driven in rotarymovement and aV center shaft entirely' eliminated making the 'fullsurface ot the shelf available tor the pans.

A furtherV object ot the invention isV an arrangement forevenly/'distributing and use ing the heat emitted from the products oicombustion over the stuit being baked soas to nicely brown the topwithout burningfthe same. This provides above the pans a zone. ofconcentrated heat, the batchbeing eX- pose'd to the concentratedheatduring only aportion of one revolution. Tt willv not be burned but theintense heat will brownit and give it a better color than is possible.with just the general heat emittedr from the burner or iirebox. Thiswill more fully appear when the construction is understoodi In thedrawings 1.-

Fig. l is an elevationV partly in section ot the oven.

Fig. 2 is a vertical cross-section of the same taken from front to back.

Fig. 3 is a plan view ot the oven.

Fig. 4 is a detail showing the shel'l con-` struction and the girderconstruction.

Fig. 5 is a section o-n the line 5-5 of Fig. 4e.

The oven comprises a lower channel ring i' a and an upper channel ring bconnected by the long vertical bolts c which bolt the rings over theupper and lower ends of the outer cylindrical wall (Z and the innercylindrical wall e. The space between the walls is acked with suitableinsulating material. The sheet metal top g and bottom f is pro vided, asare also suitable legs L. The lire pot is designated z' and in this maybeburned either coal, wood or hydrocarbon vapor.

There is supported one on each side of the 1s, im? senti s071544'.

engages with the external teeth of' the ring' r secured! toV theoutside' ofthe shelf, conse qu'ently,fyw`hen the shaft 0 is rotated by'means of the worin ntle worin gear: gg,

the' motor the entire seriesn oipslieives ie" driven in rotation. v

The cross girders areA provided withV central'bosse's s that fornibearings 'fori the studs' t supporting fianges which: support theshelves rotatablyon the' girders. yThese studs" are so short thatL they"do' not reach down the pian space between two: adjoining shelves' so astok interfere" in any' way with the arrangement of tliepans;

A plurality ot laterally' extendingarms are secured: toY the centralsupportingflange portion y. The shelves` 2 are secured" tb" these armsby means'of countersunk stove belts 3i The ring, r is similarlyjsecuredto" the under-side of the shel by the counteri sunk boltsv4leavingtlie`upper surface ofthe' slielve's-` 'tree from" allobstructions.' y l The flue. arrangement@ believel to be aB'- so'lutely:novel in connection with" ovenshaving rotatingV shelves. Products' of.combusltion are led from' the lireL pot" to the flue' u, and are thenled to the side wall oi' the oven and up through the flue o. The fluethen turns and runs across the back of the oven under the second shelfand itis here designated fw. This creates a pronounced hot zone directlyabove the pans on the lower shelf and subjects them to a high buttemporary heat as they rotate, thereby nicely browning the stuffcontained in the pans. The flue w crosses and is led up through theopposite side wall of the oven and again crosses the back of the ovenabove the second shelf and in a like manner crosses the back ci the ovenabove the third shelf Jforming what might be called roughly, azig-zagging of the iue carrying the products of combustion across theshelves and above each individual shelf at one portion of the oven.

I am well aware of the fact that rotary shelves havebeen driven in ovensheretofore from the outside of the shelf, but so far as I know, noonehas heretofore provided a permanent Support in the oven for a verticalseries ofV rotating shelves Vsupported and driven so that the pan spacebetween the shelves is in no way obstructed for the sliding andconvenient arrangement of the bake pans. This'I consider a valuableimprovement.

l/Vhat I claim is 1.- In an oven of thecharacter described, thecombination of an oven shell provided with an open interior, a verticalseries of rotating shelveshaving a diameter approximating the diameterof the oven interior, said shelves arranged to allow heated air toyrisepastthe,shelves and permanently supported therein, means forsupporting said shelves leaving free and unobstructed the pan spacebetween said shelves and also leav? ing the heated air free tocirculate, and means for continuously driving said shelves in rotation,leaving the space between said shelves free and unobstructed. v y

2. In a bake oven of the character described, the combination of anovenshell, a vertical'series o f shelves supported therein andhavinp` Aadiameter approximating the diameter or the oven interior, cross girders'rotatably supporting the' shelves iixedly within the shell withoutinterfering with the pan space between the shelves, and means fordrivin'gvsaid shelves in rotation leaving the pan` space between theshelves free from obstruction.

3.In a' balie oven ofthe character described, the combination vof anoven'shell, a vertical series ofshelves contained therein and havino adiameter approximating that ofthe oven interior, Vcross girders perma`nently supported in the oven at each end for supporting Vthe individualshelves and provided with bearings for supporting the 5. center of eachshelf rotatably, and means for engaging theoutside of the shelves foi"rotating the same.`

l. In a bake oven of the character described, the combination of an ovenshell, a pair of posts supported in the oven shell., cross girderssupported upon the posts and provided with bearings at the center of theoven, a vertical series of shelves supported rotatably at their centerupon the bearings of the cross'girders and means for engaging theoutside periphery of the shelf to rotate the same. l l

5. In an oven of the character described, the combination of an ovenshell, a pair of posts contained therein, cross girders supported by theposts and provided with center bearings and having at one end sidewiseextending arms forming rotating shaft bearings, a vertical series ofshelves supported rotatably at their centers in the lirst-nainedbearings afforded by the girders and a rotating shaft supported in thebearings furnished by the arms of the girders and provided with adriving connection for engaging the periphery of the shelves to drivethe same in rotation. i

6'. In a bake oven of the character described, the combination of ashell, a lireboX located in the shell near the bottom, one or morerotatably supported shelves located above the fire box and arranged sothat the space above the shelf or shelves has free communication with.the space about the fire box, means for continuously rotating the shelfor shelves, and a `iiue connected with the interior of the fire box forleading the products of combustion from the fire box up over therotating shelf or shelves and across a small portion only of the saineto furnish a limited Zone of intense heat yto brown the baking goods asthe shelf rotates the batch through this zone. f

In testimony'whereof I affix my signature.

ROBERT 3P. ROLLING.

